width overrides width1, width2, width3, etc. If you want the images to be different sizes, do not provide the width parameter.

alt1 is alt text of first image (see WP:ALT). Similarly for alt2, etc.

caption1 is caption of first image. Similarly for caption2, etc.

link1 is where the first page links to. Similarly for link2, etc. If not specified, image links to the image description page as usual. If specified to the empty value, the image does not link anywhere; this should be used for purely decorative images as per WP:ALT.Important: If the image is under a free license like the GFDL or a CC license, you must not use this parameter as the terms of those licenses require the license, or a link to it, to be reproduced with the image. The image must, therefore, link to its image page. Public domain and (theoretically) fair use images are not subject to this restriction.

background color defines the background color between the border of the box and the images.